CN111505250A

CN111505250A - Landslide fixed support model based on composite material and matched sensor arrangement method

Info

Publication number: CN111505250A
Application number: CN202010514582.0A
Authority: CN
Inventors: 江煜; 杨忠
Original assignee: Jinling Institute of Technology
Current assignee: Jinling Institute of Technology
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-08-07
Anticipated expiration: 2040-06-08
Also published as: CN111505250B

Abstract

The landslide solid support model based on the composite material comprises a pressing plate main body, wherein the pressing plate main body is made of the composite material, the length of the pressing plate main body is 320 millimeters, the width of the pressing plate main body is 320 millimeters, the height of the pressing plate main body is 40 millimeters, the center of the pressing plate main body is a circular ring with the inner diameter of 39 millimeters, and the surface of the inner ring is conveniently loaded and the stacking gradient of the circular ring main body is 10 millimeters or 30 millimeters or 50 millimeters. The invention provides a landslide fixed support model based on a composite material and a matched sensor arrangement method, which are used for improving the existing landslide fixed support model, so that the stress of the model is more stable, the overall performance of the model is better by adopting a CFRTP (carbon fiber reinforced rapid thermal processing) material, a new sensor arrangement mode is adopted for matching detection, the layout extraction is simple, and the width data monitoring can be carried out.

Description

Landslide fixed support model based on composite material and matched sensor arrangement method

Technical Field

The invention belongs to the field of landslide fixed support models, and particularly relates to a landslide fixed support model based on a composite material and a matched sensor arrangement method.

Background

In mountainous areas or other gullies and deep ravines, and areas with dangerous terrain, because of landslides caused by rainstorms, snowstorms or other natural disasters and special floods carrying a large amount of silt and stones, traffic facilities such as roads and railways and even villages and towns are often damaged by the special floods, and huge losses are caused. In order to avoid landslide accidents, reinforcement of steel bars and application of embedded sensor monitoring measures as shown in fig. 18 can be adopted to obtain certain prevention, but an existing landslide fixed support model is poor in stability as shown in fig. 2, and the arrangement of sensors is as shown in fig. 8, so that the arrangement is troublesome and only depth data monitoring can be performed, monitoring data are easily influenced, and monitoring is inaccurate.

Disclosure of Invention

In order to solve the problems, the invention provides a landslide fixed support model based on a composite material and a matched sensor arrangement method, wherein the existing landslide fixed support model is improved, so that the stress of the model is more stable, a CFRTP material is adopted, the overall performance of the model is better, a new sensor arrangement mode is adopted for matching detection, the layout extraction is simple, and the width data monitoring can be carried out.

Furthermore, the composite material supporting and pressing plate is made of a CFRTP composite material, and the parameter performance is as follows;

wherein E is the elastic modulus, V is the Poisson's ratio, 1, 2, 3 represent three different directions x, y, z, and G is the shear modulus.

The invention provides a sensor arrangement mode of a landslide fixed-support model based on a composite material, which is characterized in that sensors are arranged at the position 30mm away from the inner ring width of the landslide fixed-support model, the gridding size of the landslide fixed-support model is 5mm, 6L evens are defined when 30/5 is 6, 6 data points A-F from the inside to the outside are defined, each point belongs to each layer, two groups of sensors are arranged, each group is 4, each group is arranged around the center at equal angles, and the two groups of sensors are arranged in a staggered mode.

The application provides a landslide fixed support model based on composite materials and a matched sensor arrangement method, and the landslide fixed support model based on composite materials has the following advantages:

1) the method improves the original landslide fixed support model, and compared with the original landslide fixed support model after improvement, the stress is more stable;

2) the CFRTP material is a carbon fiber reinforced thermoplastic resin composite material, has the characteristics of high toughness, easiness in processing, corrosion resistance and the like, and is particularly suitable for being used in a landslide solid support model;

3) this application adopts new sensor arrangement mode cooperation to detect, and the easy data extraction of overall arrangement is simple to can carry out width data monitoring, thereby the degree of reality is higher, can better monitor.

Drawings

FIG. 1 is a schematic view of a basic model of mountain branches;

FIG. 2 is a diagram of an original model of mountain branches;

FIG. 3 is a schematic diagram of mountain solid branch original model meshing;

FIG. 4 is an original model loaded at 300kN, with a deformation of the model loading, wherein the Z-direction is 0.327 mm;

FIG. 5 is a schematic diagram of the original model loaded with 300kN, stress variation in the X-direction;

FIG. 6 is a schematic diagram of the original model loaded with 300kN, stress variation in the Y-direction;

FIG. 7 is a schematic diagram of the original model loaded with 300kN, stress variation in the Z-direction;

FIG. 8 is a schematic diagram of a raw model sensor arrangement;

FIG. 9 is a schematic diagram of a depth direction extraction pattern of original model data;

FIG. 10 is a raw model data result;

FIG. 11 is a 300kN modified model loading with a deformation of the model loading with 0.281mm in the Z-direction;

FIG. 12 is a schematic diagram of the improved model loading 300kN, X-direction stress variation;

FIG. 13 is a schematic diagram of the stress variation in the Y-direction with 300kN of the improved model loading;

FIG. 14 is a schematic diagram of the stress change in the Z-direction at 300kN for the improved model loading;

FIG. 15 is a schematic diagram of an improved model sensor arrangement;

FIG. 16 is a schematic diagram of an improved model data width direction extraction pattern;

FIG. 17 is a result of refining model data;

FIG. 18 shows the solid branches of the real mountain.

Detailed Description

The invention is described in further detail below with reference to the following detailed description and accompanying drawings:

the invention provides a landslide fixed support model based on a composite material and a matched sensor arrangement method, which are used for improving the existing landslide fixed support model, so that the stress of the model is more stable, the overall performance of the model is better by adopting a CFRTP (carbon fiber reinforced rapid thermal processing) material, a new sensor arrangement mode is adopted for matching detection, the layout extraction is simple, and the width data monitoring can be carried out.

The invention provides a landslide fixed support model based on a composite material, which comprises a pressing plate main body, wherein the pressing plate main body is made of the composite material, the length of the pressing plate main body is 320mm, the width of the pressing plate main body is 320mm, the height of the pressing plate main body is 40mm, the center of the pressing plate main body is a circular ring with the inner diameter of 39mm, and the surface of the inner ring is convenient to load a circular ring with the superposition gradient of 10mm, 30mm or 50 mm.

The composite material supporting and pressing plate is made of a CFRTP composite material, and the parameter performance is as follows;

The improved model of the invention is shown in figure 1, and the model is loaded by continuously bearing 300kN in the inner ring area.

Wherein the loading results are shown in FIGS. 11-14, wherein FIG. 11 is 300kN for improved model loading, model loading deformation, wherein the Z-direction is 0.281 mm; FIG. 12 is a schematic diagram of the improved model loading 300kN, X-direction stress variation; FIG. 13 is a schematic diagram of the stress variation in the Y-direction with 300kN of the improved model loading; FIG. 14 is a schematic diagram of the stress change in the Z-direction at 300kN for the improved model loading;

the improved model sensor arrangement is shown in fig. 15, the schematic diagram of the width direction extraction pattern is shown in fig. 16, and the specific data extraction result is shown in fig. 17.

The sensor is arranged at the position 30mm away from the inner ring width of a landslide fixed support model, the gridding size of the landslide fixed support model is 5mm, 6L evens are defined for 30/5, 6 data points A-F from inside to outside are defined, each point belongs to each layer, the number of the sensors is two, each group is 4, each group is arranged around the center at an equal angle, the two groups of sensors are arranged in a staggered mode, the point data are unstable due to the fact that the sixth point is connected with a plate, the sensors cannot be installed on the F layer, meanwhile, the A layer is an edge line and cannot be embedded into the sensors, only the middle 4 layers of the sensors can be installed, in the loading process, the stress change is in a linear reduction trend from A to F, and therefore the middle L1 layer and the L2 layer are the optimal selection layer.

The original model and the meshing thereof are respectively shown in fig. 2 and fig. 3, and the model is loaded by continuously bearing 300kN in the inner ring area.

The loading results are shown in fig. 4-7, where fig. 4 is 300kN for original model loading, and model loading deformation, where the Z-direction is 0.327 mm; FIG. 5 is a schematic diagram of the original model loaded with 300kN, stress variation in the X-direction; FIG. 6 is a schematic diagram of the original model loaded with 300kN, stress variation in the Y-direction; FIG. 7 is a graph illustrating the loading of 300kN, Z-direction stress variation for the original model.

Due to the limitation of the original model structure, the arrangement mode of the original model sensors is staggered up and down as shown in fig. 8, the schematic diagram of the depth direction extraction mode is shown in fig. 9, the mode can only carry out depth data monitoring, and the specific data extraction result is shown in fig. 10.

By comparing fig. 4 and fig. 11, the deformation of the new and old model changes significantly during the 300kN force loading process, and the deformation amount is reduced from 0.327mm to 0.281 mm. From the stress change point of view, as shown in FIGS. 10 and 17, the improved new model is improved in the x-direction, y-direction and z-direction, respectively.

In conclusion, through comparison of simulation model data, the stability of the new improved model is obviously improved, the arrangement mode of the sensors is changed from depth data monitoring to width direction monitoring, and the layout and data extraction of the sensors are convenient and simple.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made according to the technical spirit of the present invention are within the scope of the present invention as claimed.

Claims

1. The landslide fixed support model based on the composite material comprises a pressing plate main body and is characterized in that the pressing plate main body is provided with a plurality of pressing plates; the clamp plate main part adopts combined material to prop up the clamp plate, and length is 320 millimeters, and the width is 320mm, and highly is 40mm, props up the clamp plate center and is the ring that the internal diameter is 39mm, and the convenient loading stack slope in surface of inner ring is 10mm or 30mm or 50 mm's anchor ring respectively.

2. The composite-based landslide solid support model of claim 1, wherein the composite support plate is a CFRTP composite and parametric performance is as follows;

3. The sensor arrangement of the landslide solid branch model based on the composite material of any one of claims 1-2, wherein the sensors are arranged at the position 30mm away from the inner ring width of the landslide solid branch model, the gridding size of the landslide solid branch model is 5mm, 6L evens are defined when 30/5 is 6, 6 data points A-F from the inside to the outside are defined, each point belongs to each layer, two groups of sensors are arranged, each group is provided with 4 sensors, each group is arranged at equal angles around the center, and the two groups of sensors are arranged in a staggered mode.